Exercise platform



FIG. 1 is a perspective view of an exercise platform, showing my new design;

FIG. 2 is a top plan view thereof, shown fragmentarily for ease of illustration;

FIG. 3 is a front elevational view of FIG. 2, the rear view appearing the same;

FIG. 4 is a side elevational view of FIG. 2; and,

FIG. 5 is a bottom plan view of FIG. 2. 

The ornamental design for an exercise platform, as shown and described. 